Posted by **Jacob** on Sunday, September 30, 2007 at 4:28pm.

My teacher showed our class how to find the graph of a derivative using tangent lines. I can not figure this out.

I would really appreciate it if someone could help me or explain it to me.

Thank you very much for your help.

- Calculus -
**drwls**, Sunday, September 30, 2007 at 4:40pm
The slope of a straignt tangent line at any point of a y(x) curve is the derivative of the y(x) function at that point.

To get the derivative this way, you would have to draw a series of tangent lines at diffent points of the curve, measure the slope of each line, and replot the derivative function (slope vs. x) using those measured points.

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